diff --git a/library/stdarch/crates/coresimd/Cargo.toml b/library/stdarch/crates/coresimd/Cargo.toml
index 143df0c88ffe..3c9adedd6151 100644
--- a/library/stdarch/crates/coresimd/Cargo.toml
+++ b/library/stdarch/crates/coresimd/Cargo.toml
@@ -23,7 +23,7 @@ stdsimd-test = { version = "0.*", path = "../stdsimd-test" }
 stdsimd = { version = "0.0.3", path = "../stdsimd" }
 
 [target.wasm32-unknown-unknown.dev-dependencies]
-wasm-bindgen-test = "0.2.19"
+wasm-bindgen-test = "=0.2.19"
 
 [features]
 # Internal-usage only: denies all warnings.
diff --git a/library/stdarch/crates/stdsimd-test/Cargo.toml b/library/stdarch/crates/stdsimd-test/Cargo.toml
index f37539df67ee..6c1156d18869 100644
--- a/library/stdarch/crates/stdsimd-test/Cargo.toml
+++ b/library/stdarch/crates/stdsimd-test/Cargo.toml
@@ -10,7 +10,7 @@ backtrace = "0.3"
 cc = "1.0"
 lazy_static = "1.0"
 rustc-demangle = "0.1.8"
-wasm-bindgen = "0.2.19"
+wasm-bindgen = "=0.2.19"
 
 [features]
 default = []